feat(rust-first): prove retrieval parity on frozen golden baseline#71
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Advance tool/codebase_search and transport/stdio-rust-rmcp toward ts_deleted by locking a frozen golden baseline fixture and enforcing Rust authority parity in CI and release gate. - Add fixtures/golden-retrieval-baseline.json (captured rust-tfidf contract) - Add test/retrieval-parity.test.ts and MCP golden_parity integration test - Add docs/specs/coderag-migration-ledger.json (parity_proven states) - Wire parity checks into CI and benchmark:release-gate
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removed this pull request from the merge queue due to a manual request
packages/mcp-server no longer depends on @sylphx/mcp-server-sdk or @sylphx/vex, but bun.lock still listed them. CI `bun install --frozen-lockfile` failed on the test job (PR #71).
- Record transport/web-mcp-http, stdio-rust-rmcp, codebase_search as rust_impl under rej-010 (proof missing/stale; no authority_rust) - Mark transport/stdio-ts-adapter ts_deleted; freeze promotions - Accept PACKAGE_ROOT-relative native bin path in differential harness test
- Atomic write (tmp + rename) for rust-index / file-hashes persistence - Serialize all fixture-corpus unit tests behind one lock - Isolate persists_and_reloads_index_snapshot onto a private temp root
CI runners resolve `node` via Bun, which treats `node -` as a module path (`Module not found '.../-'`). Switch authority-gate ledger checks to python3 stdin scripts for portable fail-closed evaluation.
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Rust-First migration slice
Advances two in-scope capabilities from
rust_impl→parity_proventowardts_deleted:tool/codebase_searchrust_implparity_proventransport/stdio-rust-rmcprust_implparity_provenChanges
fixtures/golden-retrieval-baseline.json— frozen rust-tfidf authority contract (top-hit paths + ranked paths for 3 golden queries)test/retrieval-parity.test.ts— asserts Rust CLI matches frozen baseline exactlycrates/coderag-mcp-server/tests/golden_parity.rs— MCPcodebase_searchtool parity on benchmark corpusdocs/specs/coderag-migration-ledger.json— repo migration ledger (Phase 0 denominator lock)parity:frozen_baseline,fixtures:parity_baseline,tests:retrieval_paritychecksTests
Blockers to
ts_deleted(next slices)transport/web-mcp-http— Web MCP Streamable HTTP not shippedtransport/stdio-ts-adapter— TS stdio adapter retained for semantic/OpenAI hybrid until Web MCP cutoverFleet ledger
Control plane
ledgers/SylphxAI__coderag.jsonupdated toparity_provenfor the two capabilities above.